Bling Pro 2.0 Trophy
Bling Pro 2.0
Reach max level with a weapon (base game weapons only)The max level for weapons are level 70 (60 for handguns), the progress made through zombies and multiplayer will count for this. If you play as an operator with their favorite weapons, you'll get Double XP so make sure you do that to save some time.
See Top Of The Mountain to learn how to unlock operators.